Punching and shearing machine frame.



G H. CASE.

PUNCHING AND SHEARING MACHINE FRAME.

APPLICATION FILED APR. 18. 1911.

1 ,279,255 Patented Sept. 17, 1918.

Gr HARRY CASE, OF PHILADELPHIA, PENNSYLVANIA.

'PUNCHING AND SHEARING MACHINE FRAME.

Specification of Letters Patent.

Patented Sept. 17, 1918.

Application filed April 18, 1917. Serial No. 162,836.

To all whom it may concern:

Be it known that I, G HARRY CAsE, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Punching and Shearing Machine Frames; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part .of this specification.

This invention relates to improvements in frames for punching machines, shearing machines, forming machines and the like, and the invention consists in the combination and arrangement of the parts shown in the drawings and described in the specification, and is pointed out in the appended-claims.

Heretofore it has been the practice to make this type of machine frame either from an integral metal casting or from flat rolled plates riveted and doweled to an intermediate filler member. A disadvantage of the use of metal castings is found in the excessive weight of such castings required in order to obtain the required strength, and is found also in the liability of blow holes in castings and of other foundry defects.

A disadvantage of the type of frame which is made up of flat plates which are riveted and dowled to an intermediate filler member is found in the cost of fabrication of such frames, and also in the liability of the rivets and dowels to shear, or to become loose in the apertures of the parts through which they pass, so that the frame tends to rack under heavy stresses and strains.

In accordance with the present invention it is the purpose to produce the frame from two rolled flanged steel plates, each plate constituting preferably one half of the entire frame, and said rolled flanged plates are joined at their corresponding edges through the medium of an oxyacetylene or arc welding process in such manner that when the welding operation is finished the frame consists in effect of an integral hol- 10w sheet metal frame. Castings of suitable shape may be applied to and between the members of the frame before or after they are welded and rigidly joined to the frame members to provide means for supporting the frame, and also means to support shaft journals and other bearings for the operathe arms of the punch press, or other ing, forming and like machines, whi e at the same time the frame is light and inexpensive, as compared to a cast metal frame or multiple sheet metal frame of the same strength. I

The shaping of the two halves of the frame may be effected by either an ordinary type of sectional flanging press or by larger blanking presses, which latter may be made to form a complete frame member at one movement, with suitable dies.

I I have shown in the drawing a frame embodying the. invention and will describe the same with reference to such illustrated form. It will be understood, however, that the said invention is capable of some variations within the spirit and scope of the claims hereto appended.

As shown in said drawings:

Figure 1 is a side elevation of a frame embodying my invention, stripped of the operative. mechanism .of 7 the machine.

Fig. 2 is a vertical section on line 22.of Fig. 1. 1

Fig. 3 is a section taken through one of frame.

Fig. 4 is a like section of an alternative construction.

Fig. 5 is a detail of the welded joint.

The frame 10 shown in Fig. 1 is a typical frame for a punching machine. It comprlses in general terms a deep, rear main portion 11, a base portion 12, and an upper overhanging portion 13, forming between the base portion and overhanging portion a deep throat 14. The frame as herein shown is made of two like sheet metal rolled or swaged plates 15, 15 which are provided at their outer edges with flanges 16, and are provided at their inner edges, around the throat 14, withflanges 17. If it be desired to strengthen the frame at the throat the metal may be swaged or rolled outwardly beyond the planes of the plates 15 to constitute deep hollow stiffening ribs 18, as shown in Figs. 1, 2 and 3. As shown in Fig. 4, such strengthening ribs are omitted.

fter the plates have been thus formed they are assembled with the edges of their flanges 16 and 17 together in the position indicated in Figs. 2, 3 and 4, and are held integral or one piece deviee, has all the appearan'ce of a one piece frame.-

The flanges of the frame maybe notched to receive Castings,- such a'sthe base su'p'port- 111g oa'sting'20 and the bearing supporting casting 21, so that said castings become parts by rivets or other suitable means. At the front of thefraine, the frame members may be s'o'shap'ed as to leave openings to receive the arms 22, 23 and'upper and lower end 'eastin'gsee, '25, respeotively, and said end castings iiiay'b'e attached to the sheet metal frame throug'fh the medium of rivets 26, 27. The shape of said end Castings Will depend upon the kind of machine in which the frame'isembodied and need not be further described. The said front casting 25 constitut'e's, in addition to means for supporting a die or anvil, also a base support QSWhio'h cooperates With the base support 20 to support the maohine'frame.

I elaim as my invention 1. A hollovv'sheet metal frame comprisin a rear vertical portion and upper and lower, forwardly extending portions, form- 1 Gopi'es of this patent m be swam-(r for ing between the same a throat, said frame.

like frame, and tool supporting and die supportin castings fired to the ends of said upper and lower members. of the frame, being rigidly attached thereto 3. A hollow sheet metal frame comprising 1a rear vertical portion and upper and lower, forwardly extending portions, form- 'ing betvveenthe same a" throat, said; frame comprising tWo sheet metal plates-having exterior mating flanges and interior mating flanges about thethroat, with said flanges welded together to reduce an integral, boxlike frame, and eastiiigs applied to said plates at their'jhnetiens and attaehe'd thereto for the purpose setforth. 7

In witness 'whereer I claim theiforegoing as my invention, I hereunto appendmy sign attire in the resence of two Witnesses at Philadelphia,- Pennsylvania, this 22nd da of'Mareh, 1917. 1

I G'HARRY CASE; Witnesses: FRANK J. KLErNsofiMI'br, Gino. C(AJBAREOUR.

Washington; Die." 

